Distributed optical fiber perimeter security-monitoring system, sound reduction system and method

A distributed optical fiber, security system technology, applied in anti-theft alarms, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve problems such as false alarms and user confusion, save system resources, improve discrimination, and reduce false alarms Effect

Active Publication Date: 2015-11-25
NUCTECH CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] However, since the optical fibers in each defense zone are basically exposed to the external environment, it is very easy...

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  • Distributed optical fiber perimeter security-monitoring system, sound reduction system and method
  • Distributed optical fiber perimeter security-monitoring system, sound reduction system and method
  • Distributed optical fiber perimeter security-monitoring system, sound reduction system and method

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Embodiment Construction

[0069] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of example embodiments. communicated to those skilled in the art. In the drawings, the same reference numerals denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0070] Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practi...

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Abstract

The present disclosure provides a distributed optical fiber perimeter security-monitoring system, a sound reduction system and a method. The sound reduction system is applied to the distributed optical fiber perimeter security-monitoring system for monitoring a plurality of defense regions. The sound reduction system comprises a laser generation mechanism used for providing a laser signal; a light splitting mechanism used for splitting laser signals into multiple paths of input optical signals; a plurality of optical fiber Michelson interference mechanisms arranged in the plurality of defense regions correspondingly; and an audio output mechanism used for receiving each of all interference signals. Each optical fiber Michelson interference mechanism is configured to receive an input optical signal and output an interference signal in response to the peripheral sound pressure. When the audio output mechanism receives an alarm signal from any one defense region, the audio output mechanism outputs a sound signal obtained through reducing the interference signal in the corresponding defense region. The system of the invention facilitates people to further confirm and judge the occurrence of abnormal events, such as intrusion activities.

Description

technical field [0001] The present disclosure relates to the field of security technology, in particular to a sound restoration system, a sound restoration method and a distributed optical fiber perimeter security system. Background technique [0002] Fiber optics can be used not only for signal transmission, but for sensing applications, fiber optics can also be used as sensors. When the influence of external interference is transmitted to the optical fiber, some characteristics of the optical signal transmitted by the optical fiber will change. By configuring a special sensing instrument, the characteristics of the light, namely attenuation, phase, wavelength, polarization, mode field distribution and propagation, can be monitored. Time-varying disturbances. Through the modulation of optical signals, it is possible to measure many events and states. [0003] The distributed optical fiber perimeter security system is a distributed sensing system that uses optical fiber as...

Claims

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Application Information

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IPC IPC(8): G08B13/00G08B13/186
CPCG08B13/00G08B13/186G01H9/004G08B13/124G08B13/1672
Inventor 魏宇峰姚锴徐骏杨捷高柏松徐惠康肖航许明刘云飞董坤毛献辉
Owner NUCTECH CO LTD
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